games/hangman/getguess.c

   1 /*      $OpenBSD: getguess.c,v 1.13 2015/02/07 03:30:08 tedu Exp $      */
   2 /*      $NetBSD: getguess.c,v 1.5 1995/03/23 08:32:43 cgd Exp $ */
   3
   4 /*
   5  * Copyright (c) 1983, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #include <sys/ttydefaults.h>
  34 #include "hangman.h"
  35
  36 /*
  37  * getguess:
  38  *      Get another guess
  39  */
  40 void
  41 getguess(void)
  42 {
  43         int i;
  44         unsigned char ch, uch;
  45         bool correct;
  46
  47         leaveok(stdscr, FALSE);
  48         for (;;) {
  49                 move(PROMPTY, PROMPTX + sizeof("Guess: "));
  50                 refresh();
  51                 ch = readch();
  52                 if (isalpha(ch)) {
  53                         if (isupper(ch))
  54                                 ch = tolower(ch);
  55                         if (Guessed[ch - 'a']) {
  56                                 move(MESGY, MESGX);
  57                                 clrtoeol();
  58                                 mvprintw(MESGY, MESGX, "Already guessed '%c'",
  59                                     ch);
  60                         } else
  61                                 break;
  62                 } else if (isdigit(ch)) {
  63                         if (Guessed[ch - '0' + 26]) {
  64                                 move(MESGY, MESGX);
  65                                 clrtoeol();
  66                                 mvprintw(MESGY, MESGX, "Already guessed '%c'",
  67                                     ch);
  68                         } else
  69                                 break;
  70                 } else
  71                         if (ch == CTRL('D'))
  72                                 die(0);
  73                         else {
  74                                 move(MESGY, MESGX);
  75                                 clrtoeol();
  76                                 mvprintw(MESGY, MESGX,
  77                                     "Not a valid guess: '%s'", unctrl(ch));
  78                         }
  79         }
  80         leaveok(stdscr, TRUE);
  81         move(MESGY, MESGX);
  82         clrtoeol();
  83
  84         if (isalpha(ch))
  85                 Guessed[ch - 'a'] = TRUE;
  86         else
  87                 Guessed[ch - '0' + 26] = TRUE;
  88         correct = FALSE;
  89         uch = toupper(ch);
  90         for (i = 0; Word[i] != '\0'; i++) {
  91                 if (Word[i] == ch) {
  92                         Known[i] = ch;
  93                         correct = TRUE;
  94                 } else if (Word[i] == uch) {
  95                         Known[i] = uch;
  96                         correct = TRUE;
  97                 }
  98         }
  99         if (!correct)
 100                 Errors++;
 101 }
 102
 103 /*
 104  * readch;
 105  *      Read a character from the input
 106  */
 107 unsigned char
 108 readch(void)
 109 {
 110         int cnt;
 111         char ch;
 112
 113         cnt = 0;
 114         for (;;) {
 115                 if (read(STDIN_FILENO, &ch, sizeof(ch)) <= 0) {
 116                         if (++cnt > 100)
 117                                 die(0);
 118                 } else
 119                         if (ch == CTRL('L')) {
 120                                 wrefresh(curscr);
 121                                 mvcur(0, 0, curscr->_cury, curscr->_curx);
 122                         } else
 123                                 return ch;
 124         }
 125 }